Pipe wrench



July 3, 1928. 1,676,210

P. ARMSTRONG PIPE WRENCH Filed Nov. 29, 1926 I INVENTOR: B4 UL A8076 re 0N6 By W A 'I'TORNEY 110 (30., as as'signees of John V. Larson.

Patented July 3, 192 8. Q

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" oFcHIcAG fILLINors,"A oonrorta'riolv ortrnnrnors, J f a 1 P E NGH This invention'relzatesito thattypeof pipe co-permit limited opening movement.of the j aws by hand lin a'n application of the tool toia pipe orlike article, an example of which forms the subject matter of Patent-,No.

- 1,495,? 51,1 issued tothe Armstrong Bros; Tool the present improvement has for its object: V

, To provide a simple and effective reslllent means whereby the movable aw of a wrench structure of the above mentioned type is yieldingly moved towards the companion stationary jaw, and which at the same time is adapted to prevent accidental separation of the operating sleeve nut from its open '20 pivotal mounting on the stationary wrench member when the movable member is "removed from the structure forre pa1r,re-' placement, etc. all as willhereinafter more fully appear. In the accompanylng draw- 257ing:.- I i Fig. 1, is a side viewofa pipe wrench of c with the present improvement in place. I

Fig. 2, is an. enlarged detail transverse section on line 2-2 Fig. 1.

Like reference numerals indicatellke parts in the two views. Pipe wrenches of the present type com; prise a main handle or stock 1 carrying at one end a stationary jaw 2, and having fixed upstandingv hook shaped cheek plates 3, in transverse spaced relation to provide a guiding channel for the screw threaded shank portion .4, of the movable wrench 40 member which carries to usual angularly arranged movable wrench j aw 5. Said hook shaped cheek plates 3 also provides a rearwardly open pivot socket for an annular end head of the sleeve nut 6 by which the movable jaw 5 is adjusted to andfrom the stationary jaw, as set forth in detail in theabove mentioned Patent No. 1,495,751

In addition the main or handle member 1' carries a fixed yoke 7 in spaced relation to the aforesaid cheek-plates 3, to hold the shank of the movable jaw against lateral And . 1 Wei 1 i confine; I shank to 'q i normal extent ,ofa pivotal movement, as set 5' w 'forthinthe;aforesaid patent. I I t improve-' 1 Thematerial part ofthe presen ment an: connection f with a wrench structure substantially ast above',desci='ibed= comprises as follows.

The grearrward end .of the operating sleeve nut 6 of the movable wrench member is proa detail formation and combination of t ft vided with a plain circular portion 6 adjacent to the usual knurled perimeter of the nut, with such circular portion 6' affording a bearing contact for the end of the spring plunger, now to be described. 3

At the mid-width of the'handle or stock 1,

and in forward and adjacent relation to the aforesaid yoke 7, a receiving socket is formed, with such socket comprising an up per enlarged cylindrical portion 8- and a reduced lowercylindrical portion or'bore' 9 as shown in Fig. 2. 7

Within said socket, a plunger comprising i an upper enlarged cylindrical portion 10, and a lower reduced cylindrical portionlll, isv

\ v "arranged to slide, withits upper end, which the above mentioned patented construction, I 7 bearing contact agalnst. the c rcular surface r is preferably of a tapering form having 6' of the adjusting sleeve nut 6 aforesaid.

Intermediate of the shoulder formed at the meeting of the portions 10 and 11, and

a like shoulder formed at the meeting of Y the portions 8 and 9 of the aforesaid socket, a coiled compression spring l2is' arranged, the tendency of which is to force the plunger upward and attain a corresponding pivotal movement of the shank 4 of the movable berfi, 5, is removed for repair, replacement, etc., and thus the delay and inconvenience of seeking'and replacing a detached sleevev nut is avoided. In thepresent specific construction of the parts, the head portion 10 of the plunger that maintains the sleeve nut-6 in its operative position, is entirely shielded from accidental impacts which would act I tion to said jaw, and :having ajhookfornii.

to release the holding engagement between the plunger'and the sleeve nut, and in turn the like engagement between the sleeve nut and the ccheek plates 3, of the structure.

7 Having thus fully described my invention,-

what I claim and ters Patent, is} f I I v A pipe wrench comprising, a handle carrying a wrench jaw at one endfcheek;

desire to secure by Letplates securedto said handle in spaced relaproviding a rearwardly open pivot socket,

V a confining yoke secured to said'handlein spaced relationto said cheek plates, aconipanion wrench jaw having a screw threaded shank adapted for movementbetween said cheek plates and hold said nut from lateral displacement, said nut havinga reduced peripheral portion remote from the annular bead aforesaid, a plunger formed with an enlarged end portion adapted for bearing contact with the reduced peripheral portion of the sleeve nut to'hold sai-d'nut in its pivoted engagement with the aforesaid cheek plates andprevent detachment of the nut when the 'nio'vable wrench member is removed for repair and the like, said plung- 7 er having a reduced end portion in aligned relation to said enlarged portion, the handle having a socket or recess formed with enlarged and reduced portions complementary to the plunger and adapted to slidingly receive the same,"and a 'compressionspring arranged in theenlarged portion of said res cess and having bearing engagement with the enlarged portion of the plunger. 7 i Signed at Chicago, Illinois, this 29th day of October, 1926; r a 5 PAUL ARMSTRONG; V 

